2 Copyright (C) 1996-1997 Id Software, Inc.
3 Copyright (C) 2002 Mathieu Olivier
4 Copyright (C) 2003 Forest Hale
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License
8 as published by the Free Software Foundation; either version 2
9 of the License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
15 See the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #define QWMASTER_PORT 27000
27 #define DPMASTER_PORT 27950
29 // note this defaults on for dedicated servers, off for listen servers
30 cvar_t sv_public = {0, "sv_public", "0", "1: advertises this server on the master server (so that players can find it in the server browser); 0: allow direct queries only; -1: do not respond to direct queries; -2: do not allow anyone to connect"};
31 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
33 static cvar_t sv_masters [] =
35 {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
36 {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
37 {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
38 {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
39 {0, "sv_masterextra1", "ghdigital.com", "default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc
40 {0, "sv_masterextra2", "dpmaster.deathmask.net", "default master server 2 (admin: Willis)"}, // admin: Willis
41 {0, "sv_masterextra3", "12.166.196.192", "default master server 3 (admin: Venim)"}, // admin: Venim
42 {0, "sv_masterextra4", "excalibur.nvg.ntnu.no", "default master server 4 (admin: tChr)"}, // admin: tChr
46 static cvar_t sv_qwmasters [] =
48 {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
49 {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
50 {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
51 {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
52 {0, "sv_qwmasterextra1", "192.246.40.37:27000", "id Limbo (admin: id Software)"},
53 {0, "sv_qwmasterextra2", "192.246.40.37:27002", "id CTF (admin: id Software)"},
54 {0, "sv_qwmasterextra3", "192.246.40.37:27003", "id TeamFortress (admin: id Software)"},
55 {0, "sv_qwmasterextra4", "192.246.40.37:27004", "id Miscilaneous (admin: id Software)"},
56 {0, "sv_qwmasterextra5", "192.246.40.37:27006", "id Deathmatch Only (admin: id Software)"},
57 {0, "sv_qwmasterextra6", "150.254.66.120:27000", "Poland's master server. (admin: unknown)"},
58 {0, "sv_qwmasterextra7", "62.112.145.129:27000", "Ocrana master server. (admin: unknown)"},
59 {0, "sv_qwmasterextra8", "master.edome.net", "edome master server. (admin: unknown)"},
60 {0, "sv_qwmasterextra9", "qwmaster.barrysworld.com", "barrysworld master server. (admin: unknown)"},
61 {0, "sv_qwmasterextra10", "qwmaster.ocrana.de:27000", "Ocrana2 master server. (admin: unknown)"},
62 {0, "sv_qwmasterextra11", "213.221.174.165:27000", "unknown1 master server. (admin: unknown)"},
63 {0, "sv_qwmasterextra12", "195.74.0.8", "unknown2 master server. (admin: unknown)"},
64 {0, "sv_qwmasterextra13", "204.182.161.2", "unknown3 master server. (admin: unknown)"},
68 static double nextheartbeattime = 0;
70 sizebuf_t net_message;
71 static unsigned char net_message_buf[NET_MAXMESSAGE];
73 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
74 cvar_t net_connecttimeout = {0, "net_connecttimeout","10", "after requesting a connection, the client must reply within this many seconds or be dropped (cuts down on connect floods)"};
75 cvar_t net_connectfloodblockingtimeout = {0, "net_connectfloodblockingtimeout", "5", "when a connection packet is received, it will block all future connect packets from that IP address for this many seconds (cuts down on connect floods)"};
76 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
77 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
79 cvar_t cl_netlocalping = {0, "cl_netlocalping","0", "lags local loopback connection by this much ping time (useful to play more fairly on your own server with people with higher pings)"};
80 static cvar_t cl_netpacketloss = {0, "cl_netpacketloss","0", "drops this percentage of packets (incoming and outgoing), useful for testing network protocol robustness (effects failing to start, sounds failing to play, etc)"};
81 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
82 static cvar_t net_slist_queriesperframe = {0, "net_slist_queriesperframe", "4", "maximum number of server information requests to send each rendered frame (guards against low framerates causing problems)"};
83 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
84 static cvar_t net_slist_maxtries = {0, "net_slist_maxtries", "3", "how many times to ask the same server for information (more times gives better ping reports but takes longer)"};
86 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible"};
88 /* statistic counters */
89 static int packetsSent = 0;
90 static int packetsReSent = 0;
91 static int packetsReceived = 0;
92 static int receivedDuplicateCount = 0;
93 static int droppedDatagrams = 0;
95 static int unreliableMessagesSent = 0;
96 static int unreliableMessagesReceived = 0;
97 static int reliableMessagesSent = 0;
98 static int reliableMessagesReceived = 0;
100 double masterquerytime = -1000;
101 int masterquerycount = 0;
102 int masterreplycount = 0;
103 int serverquerycount = 0;
104 int serverreplycount = 0;
106 // this is only false if there are still servers left to query
107 static qboolean serverlist_querysleep = true;
108 // this is pushed a second or two ahead of realtime whenever a master server
109 // reply is received, to avoid issuing queries while master replies are still
110 // flooding in (which would make a mess of the ping times)
111 static double serverlist_querywaittime = 0;
113 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
114 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
116 static int cl_numsockets;
117 static lhnetsocket_t *cl_sockets[16];
118 static int sv_numsockets;
119 static lhnetsocket_t *sv_sockets[16];
121 netconn_t *netconn_list = NULL;
122 mempool_t *netconn_mempool = NULL;
124 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
125 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
126 cvar_t net_address = {0, "net_address", "0.0.0.0", "network address to open ports on"};
127 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]", "network address to open ipv6 ports on"};
129 char net_extresponse[NET_EXTRESPONSE_MAX][1400];
130 int net_extresponse_count = 0;
131 int net_extresponse_last = 0;
133 // ServerList interface
134 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
135 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
137 serverlist_infofield_t serverlist_sortbyfield;
138 qboolean serverlist_sortdescending;
140 int serverlist_viewcount = 0;
141 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
143 int serverlist_cachecount;
144 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
146 qboolean serverlist_consoleoutput;
148 // helper function to insert a value into the viewset
149 // spare entries will be removed
150 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
153 if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
154 i = serverlist_viewcount++;
156 i = SERVERLIST_VIEWLISTSIZE - 1;
159 for( ; i > index ; i-- )
160 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
162 serverlist_viewlist[index] = entry;
165 // we suppose serverlist_viewcount to be valid, ie > 0
166 static void _ServerList_ViewList_Helper_Remove( int index )
168 serverlist_viewcount--;
169 for( ; index < serverlist_viewcount ; index++ )
170 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
173 // returns true if A should be inserted before B
174 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
176 int result = 0; // > 0 if for numbers A > B and for text if A < B
178 switch( serverlist_sortbyfield ) {
180 result = A->info.ping - B->info.ping;
182 case SLIF_MAXPLAYERS:
183 result = A->info.maxplayers - B->info.maxplayers;
185 case SLIF_NUMPLAYERS:
186 result = A->info.numplayers - B->info.numplayers;
189 result = A->info.protocol - B->info.protocol;
192 result = strcmp( B->info.cname, A->info.cname );
195 result = strcmp( B->info.game, A->info.game );
198 result = strcmp( B->info.map, A->info.map );
201 result = strcmp( B->info.mod, A->info.mod );
204 result = strcmp( B->info.name, A->info.name );
207 Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
211 if( serverlist_sortdescending )
215 // if the chosen sort key is identical, sort by index
216 // (makes this a stable sort, so that later replies from servers won't
217 // shuffle the servers around when they have the same ping)
221 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
223 // This should actually be done with some intermediate and end-of-function return
235 case SLMO_GREATEREQUAL:
237 case SLMO_NOTCONTAIN:
240 Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
245 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
248 char bufferA[ 256 ], bufferB[ 256 ]; // should be more than enough
249 for (i = 0;i < (int)sizeof(bufferA)-1 && A[i];i++)
250 bufferA[i] = (A[i] >= 'A' && A[i] <= 'Z') ? (A[i] + 'a' - 'A') : A[i];
252 for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
253 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
256 // Same here, also using an intermediate & final return would be more appropriate
260 return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
261 case SLMO_NOTCONTAIN:
262 return !*bufferB || !strstr( bufferA, bufferB );
264 return strcmp( bufferA, bufferB ) < 0;
266 return strcmp( bufferA, bufferB ) <= 0;
268 return strcmp( bufferA, bufferB ) == 0;
270 return strcmp( bufferA, bufferB ) > 0;
272 return strcmp( bufferA, bufferB ) != 0;
273 case SLMO_GREATEREQUAL:
274 return strcmp( bufferA, bufferB ) >= 0;
276 Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
281 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
283 if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
285 if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
287 if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
289 if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
291 if( *mask->info.cname
292 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
295 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
298 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
301 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
304 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
309 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
313 // reject incompatible servers
314 if (entry->info.gameversion != gameversion.integer)
317 // FIXME: change this to be more readable (...)
318 // now check whether it passes through the masks
319 for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ )
320 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
323 for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ )
324 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
326 if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
329 if( !serverlist_viewcount ) {
330 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
333 // ok, insert it, we just need to find out where exactly:
336 // check whether to insert it as new first item
337 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
338 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
340 } // check whether to insert it as new last item
341 else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
342 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
346 end = serverlist_viewcount - 1;
347 while( end > start + 1 )
349 mid = (start + end) / 2;
350 // test the item that lies in the middle between start and end
351 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
352 // the item has to be in the upper half
355 // the item has to be in the lower half
358 _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
361 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
364 for( i = 0; i < serverlist_viewcount; i++ )
366 if (serverlist_viewlist[i] == entry)
368 _ServerList_ViewList_Helper_Remove(i);
374 void ServerList_RebuildViewList(void)
378 serverlist_viewcount = 0;
379 for( i = 0 ; i < serverlist_cachecount ; i++ )
380 if( serverlist_cache[i].query == SQS_QUERIED )
381 ServerList_ViewList_Insert( &serverlist_cache[i] );
384 void ServerList_ResetMasks(void)
386 memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
387 memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
391 static void _ServerList_Test(void)
394 for( i = 0 ; i < 1024 ; i++ ) {
395 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
396 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
397 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
398 serverlist_cache[serverlist_cachecount].finished = true;
399 sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
400 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
401 serverlist_cachecount++;
406 void ServerList_QueryList(qboolean querydp, qboolean queryqw)
408 //masterquerytime = realtime;
409 masterquerytime = Sys_DoubleTime();
410 masterquerycount = 0;
411 masterreplycount = 0;
412 serverquerycount = 0;
413 serverreplycount = 0;
414 serverlist_cachecount = 0;
415 serverlist_viewcount = 0;
416 serverlist_consoleoutput = false;
418 //_ServerList_Test();
420 NetConn_QueryMasters(querydp, queryqw);
425 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
427 int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
431 if (cl_netpacketloss.integer)
432 for (i = 0;i < cl_numsockets;i++)
433 if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
435 if (developer_networking.integer)
437 char addressstring[128], addressstring2[128];
438 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
441 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
442 Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
443 Com_HexDumpToConsole((unsigned char *)data, length);
446 Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
451 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
455 if (cl_netpacketloss.integer)
456 for (i = 0;i < cl_numsockets;i++)
457 if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
459 ret = LHNET_Write(mysocket, data, length, peeraddress);
460 if (developer_networking.integer)
462 char addressstring[128], addressstring2[128];
463 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
464 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
465 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
466 Com_HexDumpToConsole((unsigned char *)data, length);
471 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
473 // note this does not include the trailing NULL because we add that in the parser
474 return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
477 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol)
479 if (protocol == PROTOCOL_QUAKEWORLD)
482 qboolean sendreliable;
484 // note that it is ok to send empty messages to the qw server,
485 // otherwise it won't respond to us at all
487 sendreliable = false;
488 // if the remote side dropped the last reliable message, resend it
489 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
491 // if the reliable transmit buffer is empty, copy the current message out
492 if (!conn->sendMessageLength && conn->message.cursize)
494 memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
495 conn->sendMessageLength = conn->message.cursize;
496 SZ_Clear(&conn->message); // clear the message buffer
497 conn->qw.reliable_sequence ^= 1;
500 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
501 *((int *)(sendbuffer + 0)) = LittleLong((unsigned int)conn->qw.outgoing_sequence | ((unsigned int)sendreliable<<31));
502 // last received unreliable packet number, and last received reliable packet number (0 or 1)
503 *((int *)(sendbuffer + 4)) = LittleLong((unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
505 conn->qw.outgoing_sequence++;
506 // client sends qport in every packet
507 if (conn == cls.netcon)
509 *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
511 // also update cls.qw_outgoing_sequence
512 cls.qw_outgoing_sequence = conn->qw.outgoing_sequence;
514 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
516 Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
519 // add the reliable message if there is one
522 memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
523 packetLen += conn->sendMessageLength;
524 conn->qw.last_reliable_sequence = conn->qw.outgoing_sequence;
526 // add the unreliable message if possible
527 if (packetLen + data->cursize <= 1400)
529 memcpy(sendbuffer + packetLen, data->data, data->cursize);
530 packetLen += data->cursize;
533 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
536 unreliableMessagesSent++;
538 // delay later packets to obey rate limit
539 conn->qw.cleartime = max(conn->qw.cleartime, realtime) + packetLen * conn->qw.rate;
545 unsigned int packetLen;
546 unsigned int dataLen;
548 unsigned int *header;
550 // if a reliable message fragment has been lost, send it again
551 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
553 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
555 dataLen = conn->sendMessageLength;
560 dataLen = MAX_PACKETFRAGMENT;
564 packetLen = NET_HEADERSIZE + dataLen;
566 header = (unsigned int *)sendbuffer;
567 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
568 header[1] = BigLong(conn->nq.sendSequence - 1);
569 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
571 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
573 conn->lastSendTime = realtime;
578 // if we have a new reliable message to send, do so
579 if (!conn->sendMessageLength && conn->message.cursize)
581 if (conn->message.cursize > (int)sizeof(conn->sendMessage))
583 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
584 conn->message.overflowed = true;
588 if (developer_networking.integer && conn == cls.netcon)
590 Con_Print("client sending reliable message to server:\n");
591 SZ_HexDumpToConsole(&conn->message);
594 memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
595 conn->sendMessageLength = conn->message.cursize;
596 SZ_Clear(&conn->message);
598 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
600 dataLen = conn->sendMessageLength;
605 dataLen = MAX_PACKETFRAGMENT;
609 packetLen = NET_HEADERSIZE + dataLen;
611 header = (unsigned int *)sendbuffer;
612 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
613 header[1] = BigLong(conn->nq.sendSequence);
614 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
616 conn->nq.sendSequence++;
618 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
620 conn->lastSendTime = realtime;
622 reliableMessagesSent++;
625 // if we have an unreliable message to send, do so
628 packetLen = NET_HEADERSIZE + data->cursize;
630 if (packetLen > (int)sizeof(sendbuffer))
632 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
636 header = (unsigned int *)sendbuffer;
637 header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
638 header[1] = BigLong(conn->nq.unreliableSendSequence);
639 memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
641 conn->nq.unreliableSendSequence++;
643 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
646 unreliableMessagesSent++;
652 void NetConn_CloseClientPorts(void)
654 for (;cl_numsockets > 0;cl_numsockets--)
655 if (cl_sockets[cl_numsockets - 1])
656 LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
659 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
661 lhnetaddress_t address;
663 char addressstring2[1024];
664 if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
666 if ((s = LHNET_OpenSocket_Connectionless(&address)))
668 cl_sockets[cl_numsockets++] = s;
669 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
670 Con_Printf("Client opened a socket on address %s\n", addressstring2);
674 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
675 Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
679 Con_Printf("Client unable to parse address %s\n", addressstring);
682 void NetConn_OpenClientPorts(void)
685 NetConn_CloseClientPorts();
686 port = bound(0, cl_netport.integer, 65535);
687 if (cl_netport.integer != port)
688 Cvar_SetValueQuick(&cl_netport, port);
689 Con_Printf("Client using port %i\n", port);
690 NetConn_OpenClientPort("local:2", 0);
691 NetConn_OpenClientPort(net_address.string, port);
692 //NetConn_OpenClientPort(net_address_ipv6.string, port);
695 void NetConn_CloseServerPorts(void)
697 for (;sv_numsockets > 0;sv_numsockets--)
698 if (sv_sockets[sv_numsockets - 1])
699 LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
702 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
704 lhnetaddress_t address;
707 char addressstring2[1024];
709 for (port = defaultport; port <= defaultport + 100; port++)
711 if (LHNETADDRESS_FromString(&address, addressstring, port))
713 if ((s = LHNET_OpenSocket_Connectionless(&address)))
715 sv_sockets[sv_numsockets++] = s;
716 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
717 Con_Printf("Server listening on address %s\n", addressstring2);
722 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
723 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
728 Con_Printf("Server unable to parse address %s\n", addressstring);
729 // if it cant parse one address, it wont be able to parse another for sure
735 void NetConn_OpenServerPorts(int opennetports)
738 NetConn_CloseServerPorts();
739 NetConn_UpdateSockets();
740 port = bound(0, sv_netport.integer, 65535);
743 Con_Printf("Server using port %i\n", port);
744 if (sv_netport.integer != port)
745 Cvar_SetValueQuick(&sv_netport, port);
746 if (cls.state != ca_dedicated)
747 NetConn_OpenServerPort("local:1", 0);
750 NetConn_OpenServerPort(net_address.string, port);
751 //NetConn_OpenServerPort(net_address_ipv6.string, port);
753 if (sv_numsockets == 0)
754 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
757 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
759 int i, a = LHNETADDRESS_GetAddressType(address);
760 for (i = 0;i < cl_numsockets;i++)
761 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
762 return cl_sockets[i];
766 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
768 int i, a = LHNETADDRESS_GetAddressType(address);
769 for (i = 0;i < sv_numsockets;i++)
770 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
771 return sv_sockets[i];
775 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
778 conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
779 conn->mysocket = mysocket;
780 conn->peeraddress = *peeraddress;
781 conn->lastMessageTime = realtime;
782 conn->message.data = conn->messagedata;
783 conn->message.maxsize = sizeof(conn->messagedata);
784 conn->message.cursize = 0;
785 // LordHavoc: (inspired by ProQuake) use a short connect timeout to
786 // reduce effectiveness of connection request floods
787 conn->timeout = realtime + net_connecttimeout.value;
788 LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
789 conn->next = netconn_list;
794 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress);
795 void NetConn_Close(netconn_t *conn)
798 // remove connection from list
800 // allow the client to reconnect immediately
801 NetConn_ClearConnectFlood(&(conn->peeraddress));
803 if (conn == netconn_list)
804 netconn_list = conn->next;
807 for (c = netconn_list;c;c = c->next)
811 c->next = conn->next;
815 // not found in list, we'll avoid crashing here...
823 static int clientport = -1;
824 static int clientport2 = -1;
825 static int hostport = -1;
826 void NetConn_UpdateSockets(void)
828 if (cls.state != ca_dedicated)
830 if (clientport2 != cl_netport.integer)
832 clientport2 = cl_netport.integer;
833 if (cls.state == ca_connected)
834 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
836 if (cls.state == ca_disconnected && clientport != clientport2)
838 clientport = clientport2;
839 NetConn_CloseClientPorts();
841 if (cl_numsockets == 0)
842 NetConn_OpenClientPorts();
845 if (hostport != sv_netport.integer)
847 hostport = sv_netport.integer;
849 Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
853 static int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length, protocolversion_t protocol, double newtimeout)
858 // TODO: add netgraph stuff rather than just packetloss counting...
860 if (protocol == PROTOCOL_QUAKEWORLD)
862 int sequence, sequence_ack;
863 int reliable_ack, reliable_message;
867 sequence = LittleLong(*((int *)(data + 0)));
868 sequence_ack = LittleLong(*((int *)(data + 4)));
872 if (conn != cls.netcon)
877 // TODO: use qport to identify that this client really is who they say they are? (and elsewhere in the code to identify the connection without a port match?)
878 qport = LittleShort(*((int *)(data + 8)));
884 reliable_message = (sequence >> 31) & 1;
885 reliable_ack = (sequence_ack >> 31) & 1;
886 sequence &= ~(1<<31);
887 sequence_ack &= ~(1<<31);
888 if (sequence <= conn->qw.incoming_sequence)
890 //Con_DPrint("Got a stale datagram\n");
893 count = sequence - (conn->qw.incoming_sequence + 1);
896 droppedDatagrams += count;
897 //Con_DPrintf("Dropped %u datagram(s)\n", count);
900 conn->packetlost[conn->packetlostcounter] = true;
901 conn->packetlostcounter = (conn->packetlostcounter + 1) % 100;
904 conn->packetlost[conn->packetlostcounter] = false;
905 conn->packetlostcounter = (conn->packetlostcounter + 1) % 100;
906 if (reliable_ack == conn->qw.reliable_sequence)
908 // received, now we will be able to send another reliable message
909 conn->sendMessageLength = 0;
910 reliableMessagesReceived++;
912 conn->qw.incoming_sequence = sequence;
913 if (conn == cls.netcon)
914 cls.qw_incoming_sequence = conn->qw.incoming_sequence;
915 conn->qw.incoming_acknowledged = sequence_ack;
916 conn->qw.incoming_reliable_acknowledged = reliable_ack;
917 if (reliable_message)
918 conn->qw.incoming_reliable_sequence ^= 1;
919 conn->lastMessageTime = realtime;
920 conn->timeout = realtime + newtimeout;
921 unreliableMessagesReceived++;
922 SZ_Clear(&net_message);
923 SZ_Write(&net_message, data, length);
931 unsigned int sequence;
934 qlength = (unsigned int)BigLong(((int *)data)[0]);
935 flags = qlength & ~NETFLAG_LENGTH_MASK;
936 qlength &= NETFLAG_LENGTH_MASK;
937 // control packets were already handled
938 if (!(flags & NETFLAG_CTL) && qlength == length)
940 sequence = BigLong(((int *)data)[1]);
944 if (flags & NETFLAG_UNRELIABLE)
946 if (sequence >= conn->nq.unreliableReceiveSequence)
948 if (sequence > conn->nq.unreliableReceiveSequence)
950 count = sequence - conn->nq.unreliableReceiveSequence;
951 droppedDatagrams += count;
952 //Con_DPrintf("Dropped %u datagram(s)\n", count);
955 conn->packetlost[conn->packetlostcounter] = true;
956 conn->packetlostcounter = (conn->packetlostcounter + 1) % 100;
959 conn->packetlost[conn->packetlostcounter] = false;
960 conn->packetlostcounter = (conn->packetlostcounter + 1) % 100;
961 conn->nq.unreliableReceiveSequence = sequence + 1;
962 conn->lastMessageTime = realtime;
963 conn->timeout = realtime + newtimeout;
964 unreliableMessagesReceived++;
967 SZ_Clear(&net_message);
968 SZ_Write(&net_message, data, length);
974 // Con_DPrint("Got a stale datagram\n");
977 else if (flags & NETFLAG_ACK)
979 if (sequence == (conn->nq.sendSequence - 1))
981 if (sequence == conn->nq.ackSequence)
983 conn->nq.ackSequence++;
984 if (conn->nq.ackSequence != conn->nq.sendSequence)
985 Con_DPrint("ack sequencing error\n");
986 conn->lastMessageTime = realtime;
987 conn->timeout = realtime + newtimeout;
988 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
990 unsigned int packetLen;
991 unsigned int dataLen;
993 unsigned int *header;
995 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
996 memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
998 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1000 dataLen = conn->sendMessageLength;
1005 dataLen = MAX_PACKETFRAGMENT;
1009 packetLen = NET_HEADERSIZE + dataLen;
1011 header = (unsigned int *)sendbuffer;
1012 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
1013 header[1] = BigLong(conn->nq.sendSequence);
1014 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1016 conn->nq.sendSequence++;
1018 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
1020 conn->lastSendTime = realtime;
1025 conn->sendMessageLength = 0;
1028 // Con_DPrint("Duplicate ACK received\n");
1031 // Con_DPrint("Stale ACK received\n");
1034 else if (flags & NETFLAG_DATA)
1036 unsigned int temppacket[2];
1037 temppacket[0] = BigLong(8 | NETFLAG_ACK);
1038 temppacket[1] = BigLong(sequence);
1039 NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress);
1040 if (sequence == conn->nq.receiveSequence)
1042 conn->lastMessageTime = realtime;
1043 conn->timeout = realtime + newtimeout;
1044 conn->nq.receiveSequence++;
1045 if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1046 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1047 conn->receiveMessageLength += length;
1049 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1050 "Dropping the message!\n", sequence );
1051 conn->receiveMessageLength = 0;
1054 if (flags & NETFLAG_EOM)
1056 reliableMessagesReceived++;
1057 length = conn->receiveMessageLength;
1058 conn->receiveMessageLength = 0;
1061 SZ_Clear(&net_message);
1062 SZ_Write(&net_message, conn->receiveMessage, length);
1069 receivedDuplicateCount++;
1077 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1079 cls.connect_trying = false;
1080 M_Update_Return_Reason("");
1081 // the connection request succeeded, stop current connection and set up a new connection
1083 // if we're connecting to a remote server, shut down any local server
1084 if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1085 Host_ShutdownServer ();
1086 // allocate a net connection to keep track of things
1087 cls.netcon = NetConn_Open(mysocket, peeraddress);
1088 Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1089 key_dest = key_game;
1091 cls.demonum = -1; // not in the demo loop now
1092 cls.state = ca_connected;
1093 cls.signon = 0; // need all the signon messages before playing
1094 cls.protocol = initialprotocol;
1095 if (cls.protocol == PROTOCOL_QUAKEWORLD)
1096 Cmd_ForwardStringToServer("new");
1097 if (cls.protocol == PROTOCOL_QUAKE)
1099 // write a keepalive (clc_nop) as it seems to greatly improve the
1100 // chances of connecting to a netquake server
1102 unsigned char buf[4];
1103 memset(&msg, 0, sizeof(msg));
1105 msg.maxsize = sizeof(buf);
1106 MSG_WriteChar(&msg, clc_nop);
1107 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol);
1111 int NetConn_IsLocalGame(void)
1113 if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1118 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1122 // search the cache for this server and update it
1123 for (n = 0;n < serverlist_cachecount;n++)
1124 if (!strcmp(addressstring, serverlist_cache[n].info.cname))
1126 if (n == serverlist_cachecount)
1128 // LAN search doesnt require an answer from the master server so we wont
1129 // know the ping nor will it be initialized already...
1132 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1135 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1136 // store the data the engine cares about (address and ping)
1137 strlcpy(serverlist_cache[serverlist_cachecount].info.cname, addressstring, sizeof(serverlist_cache[serverlist_cachecount].info.cname));
1138 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1139 //serverlist_cache[serverlist_cachecount].querytime = realtime;
1140 serverlist_cache[serverlist_cachecount].querytime = Sys_DoubleTime();
1141 // if not in the slist menu we should print the server to console
1142 if (serverlist_consoleoutput)
1143 Con_Printf("querying %s\n", addressstring);
1144 ++serverlist_cachecount;
1146 // if this is the first reply from this server, count it as having replied
1147 if (serverlist_cache[n].info.ping == 100000)
1149 pingtime = (int)((Sys_DoubleTime() - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1150 pingtime = bound(0, pingtime, 9999);
1152 serverlist_cache[n].info.ping = min(serverlist_cache[n].info.ping, pingtime);
1153 // other server info is updated by the caller
1157 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1159 serverlist_info_t *info = &serverlist_cache[n].info;
1160 // update description strings for engine menu and console output
1161 dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", info->ping >= 300 ? '1' : (info->ping >= 200 ? '3' : '7'), (int)info->ping, ((info->numplayers > 0 && info->numplayers < info->maxplayers) ? (info->numplayers >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1162 dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game, (info->gameversion != gameversion.integer) ? '1' : '4', info->mod, info->map);
1163 if (serverlist_cache[n].query == SQS_QUERIED)
1164 ServerList_ViewList_Remove(&serverlist_cache[n]);
1165 // if not in the slist menu we should print the server to console (if wanted)
1166 else if( serverlist_consoleoutput )
1167 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1168 // and finally, update the view set
1169 ServerList_ViewList_Insert( &serverlist_cache[n] );
1170 serverlist_cache[n].query = SQS_QUERIED;
1173 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1175 qboolean fromserver;
1176 int ret, c, control;
1178 char *string, addressstring2[128], ipstring[32];
1179 char stringbuf[16384];
1181 // quakeworld ingame packet
1182 fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1184 // convert the address to a string incase we need it
1185 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1187 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1189 // received a command string - strip off the packaging and put it
1190 // into our string buffer with NULL termination
1193 length = min(length, (int)sizeof(stringbuf) - 1);
1194 memcpy(stringbuf, data, length);
1195 stringbuf[length] = 0;
1198 if (developer_networking.integer)
1200 Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1201 Com_HexDumpToConsole(data, length);
1204 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1206 // darkplaces or quake3
1207 char protocolnames[1400];
1208 Protocol_Names(protocolnames, sizeof(protocolnames));
1209 Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1210 M_Update_Return_Reason("Got challenge response");
1211 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1212 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1213 // TODO: add userinfo stuff here instead of using NQ commands?
1214 NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress);
1217 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1219 // darkplaces or quake3
1220 M_Update_Return_Reason("Accepted");
1221 NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1224 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1226 char rejectreason[32];
1227 cls.connect_trying = false;
1229 length = max(length - 7, (int)sizeof(rejectreason) - 1);
1230 memcpy(rejectreason, string, length);
1231 rejectreason[length] = 0;
1232 M_Update_Return_Reason(rejectreason);
1235 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1237 serverlist_info_t *info;
1241 // search the cache for this server and update it
1242 n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1246 info = &serverlist_cache[n].info;
1247 if ((s = SearchInfostring(string, "gamename" )) != NULL) strlcpy(info->game, s, sizeof (info->game));else info->game[0] = 0;
1248 if ((s = SearchInfostring(string, "modname" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0] = 0;
1249 if ((s = SearchInfostring(string, "mapname" )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0] = 0;
1250 if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1251 if ((s = SearchInfostring(string, "protocol" )) != NULL) info->protocol = atoi(s);else info->protocol = -1;
1252 if ((s = SearchInfostring(string, "clients" )) != NULL) info->numplayers = atoi(s);else info->numplayers = 0;
1253 if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);else info->maxplayers = 0;
1254 if ((s = SearchInfostring(string, "gameversion" )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1256 NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1260 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1262 // Extract the IP addresses
1266 if (serverlist_consoleoutput)
1267 Con_Print("received DarkPlaces server list...\n");
1268 while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
1272 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], data[5] * 256 + data[6]);
1273 if (serverlist_consoleoutput && developer_networking.integer)
1274 Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1275 // ignore the rest of the message if the serverlist is full
1276 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1278 // also ignore it if we have already queried it (other master server response)
1279 for( n = 0 ; n < serverlist_cachecount ; n++ )
1280 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1282 if( n >= serverlist_cachecount )
1286 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1287 serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_DARKPLACES7;
1288 // store the data the engine cares about (address and ping)
1289 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1290 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1291 serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1293 ++serverlist_cachecount;
1296 // move on to next address in packet
1300 // begin or resume serverlist queries
1301 serverlist_querysleep = false;
1302 serverlist_querywaittime = realtime + 3;
1305 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1307 // Extract the IP addresses
1311 if (serverlist_consoleoutput)
1312 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
1313 while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1317 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1318 if (serverlist_consoleoutput && developer_networking.integer)
1319 Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1320 // ignore the rest of the message if the serverlist is full
1321 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1323 // also ignore it if we have already queried it (other master server response)
1324 for( n = 0 ; n < serverlist_cachecount ; n++ )
1325 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1327 if( n >= serverlist_cachecount )
1331 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1332 serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_QUAKEWORLD;
1333 // store the data the engine cares about (address and ping)
1334 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1335 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1336 serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1338 ++serverlist_cachecount;
1341 // move on to next address in packet
1345 // begin or resume serverlist queries
1346 serverlist_querysleep = false;
1347 serverlist_querywaittime = realtime + 3;
1350 if (!strncmp(string, "extResponse ", 12))
1352 ++net_extresponse_count;
1353 if(net_extresponse_count > NET_EXTRESPONSE_MAX)
1354 net_extresponse_count = NET_EXTRESPONSE_MAX;
1355 net_extresponse_last = (net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
1356 dpsnprintf(net_extresponse[net_extresponse_last], sizeof(net_extresponse[net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
1359 if (!strncmp(string, "ping", 4))
1361 if (developer.integer >= 10)
1362 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
1363 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1366 if (!strncmp(string, "ack", 3))
1368 // QuakeWorld compatibility
1369 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
1371 // challenge message
1372 Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
1373 M_Update_Return_Reason("Got QuakeWorld challenge response");
1374 cls.qw_qport = qport.integer;
1375 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1376 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1377 NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1380 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1383 M_Update_Return_Reason("QuakeWorld Accepted");
1384 NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1387 if (length > 2 && !memcmp(string, "n\\", 2))
1389 serverlist_info_t *info;
1393 if (serverlist_consoleoutput && developer_networking.integer >= 2)
1394 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1397 // search the cache for this server and update it
1398 n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1402 info = &serverlist_cache[n].info;
1403 strlcpy(info->game, "QuakeWorld", sizeof(info->game));;
1404 if ((s = SearchInfostring(string, "*gamedir" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0] = 0;
1405 if ((s = SearchInfostring(string, "map" )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0] = 0;
1406 if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1408 info->numplayers = 0; // updated below
1409 if ((s = SearchInfostring(string, "maxclients" )) != NULL) info->maxplayers = atoi(s);else info->maxplayers = 0;
1410 if ((s = SearchInfostring(string, "gameversion" )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1412 // count active players on server
1413 // (we could gather more info, but we're just after the number)
1414 s = strchr(string, '\n');
1418 while (s < string + length)
1420 for (;s < string + length && *s != '\n';s++)
1422 if (s >= string + length)
1429 NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1433 if (string[0] == 'n')
1436 Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
1438 // we may not have liked the packet, but it was a command packet, so
1439 // we're done processing this packet now
1442 // quakeworld ingame packet
1443 if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1446 CL_ParseServerMessage();
1449 // netquake control packets, supported for compatibility only
1450 if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1453 serverlist_info_t *info;
1461 if (developer.integer >= 10)
1462 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1463 if (cls.connect_trying)
1465 lhnetaddress_t clientportaddress;
1466 clientportaddress = *peeraddress;
1469 unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
1472 LHNETADDRESS_SetPort(&clientportaddress, port);
1474 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1475 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1476 M_Update_Return_Reason("Accepted");
1477 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
1481 if (developer.integer >= 10)
1482 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1483 cls.connect_trying = false;
1484 M_Update_Return_Reason((char *)data);
1486 case CCREP_SERVER_INFO:
1487 if (developer.integer >= 10)
1488 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1489 // LordHavoc: because the quake server may report weird addresses
1490 // we just ignore it and keep the real address
1492 // search the cache for this server and update it
1493 n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1497 info = &serverlist_cache[n].info;
1498 strlcpy(info->game, "Quake", sizeof(info->game));
1499 strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
1500 strlcpy(info->name, MSG_ReadString(), sizeof(info->name));
1501 strlcpy(info->map , MSG_ReadString(), sizeof(info->map));
1502 info->numplayers = MSG_ReadByte();
1503 info->maxplayers = MSG_ReadByte();
1504 info->protocol = MSG_ReadByte();
1506 NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1509 case CCREP_PLAYER_INFO:
1510 // we got a CCREP_PLAYER_INFO??
1511 //if (developer.integer >= 10)
1512 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1514 case CCREP_RULE_INFO:
1515 // we got a CCREP_RULE_INFO??
1516 //if (developer.integer >= 10)
1517 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1522 // we may not have liked the packet, but it was a valid control
1523 // packet, so we're done processing this packet now
1527 if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1528 CL_ParseServerMessage();
1532 void NetConn_QueryQueueFrame(void)
1538 static double querycounter = 0;
1540 if (serverlist_querysleep)
1543 // apply a cool down time after master server replies,
1544 // to avoid messing up the ping times on the servers
1545 if (serverlist_querywaittime > realtime)
1548 // each time querycounter reaches 1.0 issue a query
1549 querycounter += cl.realframetime * net_slist_queriespersecond.value;
1550 maxqueries = (int)querycounter;
1551 maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
1552 querycounter -= maxqueries;
1554 if( maxqueries == 0 ) {
1558 // scan serverlist and issue queries as needed
1559 serverlist_querysleep = true;
1561 timeouttime = realtime - net_slist_timeout.value;
1562 for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ )
1564 serverlist_entry_t *entry = &serverlist_cache[ index ];
1565 if( entry->query != SQS_QUERYING )
1570 serverlist_querysleep = false;
1571 if( entry->querycounter != 0 && entry->querytime > timeouttime )
1576 if( entry->querycounter != (unsigned) net_slist_maxtries.integer )
1578 lhnetaddress_t address;
1581 LHNETADDRESS_FromString(&address, entry->info.cname, 0);
1582 if (entry->protocol == PROTOCOL_QUAKEWORLD)
1584 for (socket = 0; socket < cl_numsockets ; socket++)
1585 NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
1589 for (socket = 0; socket < cl_numsockets ; socket++)
1590 NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getinfo", &address);
1593 //entry->querytime = realtime;
1594 entry->querytime = Sys_DoubleTime();
1595 entry->querycounter++;
1597 // if not in the slist menu we should print the server to console
1598 if (serverlist_consoleoutput)
1599 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
1605 entry->query = SQS_TIMEDOUT;
1610 void NetConn_ClientFrame(void)
1613 lhnetaddress_t peeraddress;
1614 NetConn_UpdateSockets();
1615 if (cls.connect_trying && cls.connect_nextsendtime < realtime)
1617 if (cls.connect_remainingtries == 0)
1618 M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
1619 cls.connect_nextsendtime = realtime + 1;
1620 cls.connect_remainingtries--;
1621 if (cls.connect_remainingtries <= -10)
1623 cls.connect_trying = false;
1624 M_Update_Return_Reason("Connect: Failed");
1627 // try challenge first (newer DP server or QW)
1628 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
1629 // then try netquake as a fallback (old server, or netquake)
1630 SZ_Clear(&net_message);
1631 // save space for the header, filled in later
1632 MSG_WriteLong(&net_message, 0);
1633 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1634 MSG_WriteString(&net_message, "QUAKE");
1635 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1636 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1637 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
1638 SZ_Clear(&net_message);
1640 for (i = 0;i < cl_numsockets;i++)
1641 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1642 NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
1643 NetConn_QueryQueueFrame();
1644 if (cls.netcon && realtime > cls.netcon->timeout)
1646 Con_Print("Connection timed out\n");
1648 Host_ShutdownServer ();
1652 #define MAX_CHALLENGES 128
1655 lhnetaddress_t address;
1659 challenge[MAX_CHALLENGES];
1661 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1665 for (i = 0;i < bufferlength - 1;i++)
1669 c = rand () % (127 - 33) + 33;
1670 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1676 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
1678 unsigned int nb_clients = 0, i;
1681 // How many clients are there?
1682 for (i = 0;i < (unsigned int)svs.maxclients;i++)
1683 if (svs.clients[i].active)
1686 // TODO: we should add more information for the full status string
1687 length = dpsnprintf(out_msg, out_size,
1688 "\377\377\377\377%s\x0A"
1689 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
1690 "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
1693 fullstatus ? "statusResponse" : "infoResponse",
1694 gamename, com_modname, gameversion.integer, svs.maxclients,
1695 nb_clients, sv.name, hostname.string, NET_PROTOCOL_VERSION,
1696 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
1697 fullstatus ? "\n" : "");
1699 // Make sure it fits in the buffer
1708 ptr = out_msg + length;
1709 left = (int)out_size - length;
1711 for (i = 0;i < (unsigned int)svs.maxclients;i++)
1713 client_t *cl = &svs.clients[i];
1716 int nameind, cleanind, pingvalue;
1718 char cleanname [sizeof(cl->name)];
1720 // Remove all characters '"' and '\' in the player name
1725 curchar = cl->name[nameind++];
1726 if (curchar != '"' && curchar != '\\')
1728 cleanname[cleanind++] = curchar;
1729 if (cleanind == sizeof(cleanname) - 1)
1732 } while (curchar != '\0');
1734 pingvalue = (int)(cl->ping * 1000.0f);
1735 if(cl->netconnection)
1736 pingvalue = bound(1, pingvalue, 9999);
1739 length = dpsnprintf(ptr, left, "%d %d \"%s\"\n",
1754 static qboolean NetConn_PreventConnectFlood(lhnetaddress_t *peeraddress)
1756 int floodslotnum, bestfloodslotnum;
1757 double bestfloodtime;
1758 lhnetaddress_t noportpeeraddress;
1759 // see if this is a connect flood
1760 noportpeeraddress = *peeraddress;
1761 LHNETADDRESS_SetPort(&noportpeeraddress, 0);
1762 bestfloodslotnum = 0;
1763 bestfloodtime = sv.connectfloodaddresses[bestfloodslotnum].lasttime;
1764 for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
1766 if (bestfloodtime >= sv.connectfloodaddresses[floodslotnum].lasttime)
1768 bestfloodtime = sv.connectfloodaddresses[floodslotnum].lasttime;
1769 bestfloodslotnum = floodslotnum;
1771 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
1773 // this address matches an ongoing flood address
1774 if (realtime < sv.connectfloodaddresses[floodslotnum].lasttime + net_connectfloodblockingtimeout.value)
1776 // renew the ban on this address so it does not expire
1777 // until the flood has subsided
1778 sv.connectfloodaddresses[floodslotnum].lasttime = realtime;
1779 //Con_Printf("Flood detected!\n");
1782 // the flood appears to have subsided, so allow this
1783 bestfloodslotnum = floodslotnum; // reuse the same slot
1787 // begin a new timeout on this address
1788 sv.connectfloodaddresses[bestfloodslotnum].address = noportpeeraddress;
1789 sv.connectfloodaddresses[bestfloodslotnum].lasttime = realtime;
1790 //Con_Printf("Flood detection initiated!\n");
1794 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress)
1797 lhnetaddress_t noportpeeraddress;
1798 // see if this is a connect flood
1799 noportpeeraddress = *peeraddress;
1800 LHNETADDRESS_SetPort(&noportpeeraddress, 0);
1801 for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
1803 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
1805 // this address matches an ongoing flood address
1807 sv.connectfloodaddresses[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
1808 sv.connectfloodaddresses[floodslotnum].lasttime = 0;
1809 //Con_Printf("Flood cleared!\n");
1814 extern void SV_SendServerinfo (client_t *client);
1815 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1817 int i, ret, clientnum, best;
1820 char *s, *string, response[1400], addressstring2[128], stringbuf[16384];
1825 // convert the address to a string incase we need it
1826 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1828 // see if we can identify the sender as a local player
1829 // (this is necessary for rcon to send a reliable reply if the client is
1830 // actually on the server, not sending remotely)
1831 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1832 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1834 if (i == svs.maxclients)
1837 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1839 // received a command string - strip off the packaging and put it
1840 // into our string buffer with NULL termination
1843 length = min(length, (int)sizeof(stringbuf) - 1);
1844 memcpy(stringbuf, data, length);
1845 stringbuf[length] = 0;
1848 if (developer.integer >= 10)
1850 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1851 Com_HexDumpToConsole(data, length);
1854 if (length >= 12 && !memcmp(string, "getchallenge", 12) && sv_public.integer > -2)
1856 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1858 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1860 if (besttime > challenge[i].time)
1861 besttime = challenge[best = i].time;
1863 // if we did not find an exact match, choose the oldest and
1864 // update address and string
1865 if (i == MAX_CHALLENGES)
1868 challenge[i].address = *peeraddress;
1869 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1871 challenge[i].time = realtime;
1872 // send the challenge
1873 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1876 if (length > 8 && !memcmp(string, "connect\\", 8) && sv_public.integer > -2)
1881 if (!(s = SearchInfostring(string, "challenge")))
1883 // validate the challenge
1884 for (i = 0;i < MAX_CHALLENGES;i++)
1885 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1887 // if the challenge is not recognized, drop the packet
1888 if (i == MAX_CHALLENGES)
1891 // check engine protocol
1892 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1894 if (developer.integer >= 10)
1895 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1896 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1900 // see if this is a duplicate connection request or a disconnected
1901 // client who is rejoining to the same client slot
1902 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1904 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1906 // this is a known client...
1907 if (client->spawned)
1909 // client crashed and is coming back,
1910 // keep their stuff intact
1911 if (developer.integer >= 10)
1912 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
1913 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1915 SV_SendServerinfo(client);
1920 // client is still trying to connect,
1921 // so we send a duplicate reply
1922 if (developer.integer >= 10)
1923 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1924 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1930 if (NetConn_PreventConnectFlood(peeraddress))
1933 // find an empty client slot for this new client
1934 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1937 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
1939 // allocated connection
1940 if (developer.integer >= 10)
1941 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1942 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1943 // now set up the client
1945 SV_ConnectClient(clientnum, conn);
1947 NetConn_Heartbeat(1);
1952 // no empty slots found - server is full
1953 if (developer.integer >= 10)
1954 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1955 NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1959 if (length >= 7 && !memcmp(string, "getinfo", 7) && sv_public.integer > -1)
1961 const char *challenge = NULL;
1963 // If there was a challenge in the getinfo message
1964 if (length > 8 && string[7] == ' ')
1965 challenge = string + 8;
1967 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
1969 if (developer.integer >= 10)
1970 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1971 NetConn_WriteString(mysocket, response, peeraddress);
1975 if (length >= 9 && !memcmp(string, "getstatus", 9) && sv_public.integer > -1)
1977 const char *challenge = NULL;
1979 // If there was a challenge in the getinfo message
1980 if (length > 10 && string[9] == ' ')
1981 challenge = string + 10;
1983 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
1985 if (developer.integer >= 10)
1986 Con_Printf("Sending reply to client %s - %s\n", addressstring2, response);
1987 NetConn_WriteString(mysocket, response, peeraddress);
1991 if (length >= 5 && !memcmp(string, "rcon ", 5))
1994 char *s = string + 5;
1996 for (i = 0;*s > ' ';s++)
1997 if (i < (int)sizeof(password) - 1)
2000 if (password[0] > ' ' && !strcmp(rcon_password.string, password))
2002 // looks like a legitimate rcon command with the correct password
2003 Con_Printf("server received rcon command from %s:\n%s\n", host_client ? host_client->name : addressstring2, s);
2004 rcon_redirect = true;
2005 rcon_redirect_bufferpos = 0;
2006 Cmd_ExecuteString(s, src_command);
2007 rcon_redirect_buffer[rcon_redirect_bufferpos] = 0;
2008 rcon_redirect = false;
2009 // print resulting text to client
2010 // if client is playing, send a reliable reply instead of
2014 // if the netconnection is loop, then this is the
2015 // local player on a listen mode server, and it would
2016 // result in duplicate printing to the console
2017 // (not that the local player should be using rcon
2018 // when they have the console)
2019 if (host_client->netconnection && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2020 SV_ClientPrintf("%s", rcon_redirect_buffer);
2025 dpsnprintf(response, sizeof(response), "\377\377\377\377n%s", rcon_redirect_buffer);
2026 NetConn_WriteString(mysocket, response, peeraddress);
2031 if (!strncmp(string, "ping", 4))
2033 if (developer.integer >= 10)
2034 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
2035 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
2038 if (!strncmp(string, "ack", 3))
2040 // we may not have liked the packet, but it was a command packet, so
2041 // we're done processing this packet now
2044 // netquake control packets, supported for compatibility only, and only
2045 // when running game protocols that are normally served via this connection
2047 // (this protects more modern protocols against being used for
2048 // Quake packet flood Denial Of Service attacks)
2049 if (length >= 5 && (i = BigLong(*((int *)data))) && (i & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (i & NETFLAG_LENGTH_MASK) == length && (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3))
2057 if (developer.integer >= 10)
2058 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
2059 if (length < (int)strlen("QUAKE") + 1 + 1)
2061 if(sv_public.integer <= -2)
2064 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
2066 if (developer.integer >= 10)
2067 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
2068 SZ_Clear(&net_message);
2069 // save space for the header, filled in later
2070 MSG_WriteLong(&net_message, 0);
2071 MSG_WriteByte(&net_message, CCREP_REJECT);
2072 MSG_WriteString(&net_message, "Incompatible version.\n");
2073 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2074 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2075 SZ_Clear(&net_message);
2079 // see if this connect request comes from a known client
2080 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2082 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2084 // this is either a duplicate connection request
2085 // or coming back from a timeout
2086 // (if so, keep their stuff intact)
2089 if (developer.integer >= 10)
2090 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
2091 SZ_Clear(&net_message);
2092 // save space for the header, filled in later
2093 MSG_WriteLong(&net_message, 0);
2094 MSG_WriteByte(&net_message, CCREP_ACCEPT);
2095 MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
2096 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2097 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2098 SZ_Clear(&net_message);
2100 // if client is already spawned, re-send the
2101 // serverinfo message as they'll need it to play
2102 if (client->spawned)
2105 SV_SendServerinfo(client);
2112 // this is a new client, check for connection flood
2113 if (NetConn_PreventConnectFlood(peeraddress))
2116 // find a slot for the new client
2117 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2120 if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
2122 // connect to the client
2123 // everything is allocated, just fill in the details
2124 strlcpy (conn->address, addressstring2, sizeof (conn->address));
2125 if (developer.integer >= 10)
2126 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
2127 // send back the info about the server connection
2128 SZ_Clear(&net_message);
2129 // save space for the header, filled in later
2130 MSG_WriteLong(&net_message, 0);
2131 MSG_WriteByte(&net_message, CCREP_ACCEPT);
2132 MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
2133 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2134 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2135 SZ_Clear(&net_message);
2136 // now set up the client struct
2138 SV_ConnectClient(clientnum, conn);
2140 NetConn_Heartbeat(1);
2145 if (developer.integer >= 10)
2146 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
2147 // no room; try to let player know
2148 SZ_Clear(&net_message);
2149 // save space for the header, filled in later
2150 MSG_WriteLong(&net_message, 0);
2151 MSG_WriteByte(&net_message, CCREP_REJECT);
2152 MSG_WriteString(&net_message, "Server is full.\n");
2153 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2154 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2155 SZ_Clear(&net_message);
2157 case CCREQ_SERVER_INFO:
2158 if (developer.integer >= 10)
2159 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
2160 if(sv_public.integer <= -1)
2162 if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
2165 char myaddressstring[128];
2166 if (developer.integer >= 10)
2167 Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
2168 SZ_Clear(&net_message);
2169 // save space for the header, filled in later
2170 MSG_WriteLong(&net_message, 0);
2171 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
2172 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
2173 MSG_WriteString(&net_message, myaddressstring);
2174 MSG_WriteString(&net_message, hostname.string);
2175 MSG_WriteString(&net_message, sv.name);
2176 // How many clients are there?
2177 for (i = 0, numclients = 0;i < svs.maxclients;i++)
2178 if (svs.clients[i].active)
2180 MSG_WriteByte(&net_message, numclients);
2181 MSG_WriteByte(&net_message, svs.maxclients);
2182 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2183 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2184 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2185 SZ_Clear(&net_message);
2188 case CCREQ_PLAYER_INFO:
2189 if (developer.integer >= 10)
2190 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
2191 if(sv_public.integer <= -1)
2195 int playerNumber, activeNumber, clientNumber;
2198 playerNumber = MSG_ReadByte();
2200 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
2201 if (client->active && ++activeNumber == playerNumber)
2203 if (clientNumber != svs.maxclients)
2205 SZ_Clear(&net_message);
2206 // save space for the header, filled in later
2207 MSG_WriteLong(&net_message, 0);
2208 MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
2209 MSG_WriteByte(&net_message, playerNumber);
2210 MSG_WriteString(&net_message, client->name);
2211 MSG_WriteLong(&net_message, client->colors);
2212 MSG_WriteLong(&net_message, (int)client->edict->fields.server->frags);
2213 MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
2214 MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
2215 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2216 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2217 SZ_Clear(&net_message);
2221 case CCREQ_RULE_INFO:
2222 if (developer.integer >= 10)
2223 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
2224 if(sv_public.integer <= -1)
2231 // find the search start location
2232 prevCvarName = MSG_ReadString();
2233 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
2235 // send the response
2236 SZ_Clear(&net_message);
2237 // save space for the header, filled in later
2238 MSG_WriteLong(&net_message, 0);
2239 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
2242 MSG_WriteString(&net_message, var->name);
2243 MSG_WriteString(&net_message, var->string);
2245 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2246 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2247 SZ_Clear(&net_message);
2253 // we may not have liked the packet, but it was a valid control
2254 // packet, so we're done processing this packet now
2259 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->spawned ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
2262 SV_ReadClientMessage();
2270 void NetConn_ServerFrame(void)
2273 lhnetaddress_t peeraddress;
2274 for (i = 0;i < sv_numsockets;i++)
2275 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2276 NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
2277 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2279 // never timeout loopback connections
2280 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2282 Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
2284 SV_DropClient(false);
2290 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
2294 lhnetaddress_t masteraddress;
2295 lhnetaddress_t broadcastaddress;
2298 if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
2301 // 26000 is the default quake server port, servers on other ports will not
2303 // note this is IPv4-only, I doubt there are IPv6-only LANs out there
2304 LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
2308 for (i = 0;i < cl_numsockets;i++)
2312 // search LAN for Quake servers
2313 SZ_Clear(&net_message);
2314 // save space for the header, filled in later
2315 MSG_WriteLong(&net_message, 0);
2316 MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
2317 MSG_WriteString(&net_message, "QUAKE");
2318 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2319 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2320 NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
2321 SZ_Clear(&net_message);
2323 // search LAN for DarkPlaces servers
2324 NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress);
2326 // build the getservers message to send to the dpmaster master servers
2327 dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
2330 for (masternum = 0;sv_masters[masternum].name;masternum++)
2332 if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2335 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
2342 // only query QuakeWorld servers when the user wants to
2345 for (i = 0;i < cl_numsockets;i++)
2349 // search LAN for QuakeWorld servers
2350 NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
2352 // build the getservers message to send to the qwmaster master servers
2353 // note this has no -1 prefix, and the trailing nul byte is sent
2354 dpsnprintf(request, sizeof(request), "c\n");
2357 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
2359 if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2361 if (m_state != m_slist)
2363 char lookupstring[128];
2364 LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
2365 Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
2368 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
2374 if (!masterquerycount)
2376 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
2377 M_Update_Return_Reason("No network");
2381 void NetConn_Heartbeat(int priority)
2383 lhnetaddress_t masteraddress;
2385 lhnetsocket_t *mysocket;
2387 // if it's a state change (client connected), limit next heartbeat to no
2388 // more than 30 sec in the future
2389 if (priority == 1 && nextheartbeattime > realtime + 30.0)
2390 nextheartbeattime = realtime + 30.0;
2392 // limit heartbeatperiod to 30 to 270 second range,
2393 // lower limit is to avoid abusing master servers with excess traffic,
2394 // upper limit is to avoid timing out on the master server (which uses
2396 if (sv_heartbeatperiod.value < 30)
2397 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
2398 if (sv_heartbeatperiod.value > 270)
2399 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
2401 // make advertising optional and don't advertise singleplayer games, and
2402 // only send a heartbeat as often as the admin wants
2403 if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
2405 nextheartbeattime = realtime + sv_heartbeatperiod.value;
2406 for (masternum = 0;sv_masters[masternum].name;masternum++)
2407 if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
2408 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
2412 static void Net_Heartbeat_f(void)
2415 NetConn_Heartbeat(2);
2417 Con_Print("No server running, can not heartbeat to master server.\n");
2420 void PrintStats(netconn_t *conn)
2422 if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
2423 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->qw.outgoing_sequence, conn->qw.incoming_sequence);
2425 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
2428 void Net_Stats_f(void)
2431 Con_Printf("unreliable messages sent = %i\n", unreliableMessagesSent);
2432 Con_Printf("unreliable messages recv = %i\n", unreliableMessagesReceived);
2433 Con_Printf("reliable messages sent = %i\n", reliableMessagesSent);
2434 Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
2435 Con_Printf("packetsSent = %i\n", packetsSent);
2436 Con_Printf("packetsReSent = %i\n", packetsReSent);
2437 Con_Printf("packetsReceived = %i\n", packetsReceived);
2438 Con_Printf("receivedDuplicateCount = %i\n", receivedDuplicateCount);
2439 Con_Printf("droppedDatagrams = %i\n", droppedDatagrams);
2440 Con_Print("connections =\n");
2441 for (conn = netconn_list;conn;conn = conn->next)
2445 void Net_Slist_f(void)
2447 ServerList_ResetMasks();
2448 serverlist_sortbyfield = SLIF_PING;
2449 serverlist_sortdescending = false;
2450 if (m_state != m_slist) {
2451 Con_Print("Sending requests to master servers\n");
2452 ServerList_QueryList(true, false);
2453 serverlist_consoleoutput = true;
2454 Con_Print("Listening for replies...\n");
2456 ServerList_QueryList(true, false);
2459 void Net_SlistQW_f(void)
2461 ServerList_ResetMasks();
2462 serverlist_sortbyfield = SLIF_PING;
2463 serverlist_sortdescending = false;
2464 if (m_state != m_slist) {
2465 Con_Print("Sending requests to master servers\n");
2466 ServerList_QueryList(false, true);
2467 serverlist_consoleoutput = true;
2468 Con_Print("Listening for replies...\n");
2470 ServerList_QueryList(false, true);
2473 void NetConn_Init(void)
2476 lhnetaddress_t tempaddress;
2477 netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
2478 Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
2479 Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
2480 Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
2481 Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
2482 Cvar_RegisterVariable(&net_slist_queriespersecond);
2483 Cvar_RegisterVariable(&net_slist_queriesperframe);
2484 Cvar_RegisterVariable(&net_slist_timeout);
2485 Cvar_RegisterVariable(&net_slist_maxtries);
2486 Cvar_RegisterVariable(&net_messagetimeout);
2487 Cvar_RegisterVariable(&net_connecttimeout);
2488 Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
2489 Cvar_RegisterVariable(&cl_netlocalping);
2490 Cvar_RegisterVariable(&cl_netpacketloss);
2491 Cvar_RegisterVariable(&hostname);
2492 Cvar_RegisterVariable(&developer_networking);
2493 Cvar_RegisterVariable(&cl_netport);
2494 Cvar_RegisterVariable(&sv_netport);
2495 Cvar_RegisterVariable(&net_address);
2496 //Cvar_RegisterVariable(&net_address_ipv6);
2497 Cvar_RegisterVariable(&sv_public);
2498 Cvar_RegisterVariable(&sv_heartbeatperiod);
2499 for (i = 0;sv_masters[i].name;i++)
2500 Cvar_RegisterVariable(&sv_masters[i]);
2501 Cvar_RegisterVariable(&gameversion);
2502 // COMMANDLINEOPTION: Server: -ip <ipaddress> sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically.
2503 if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
2505 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
2507 Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
2508 Cvar_SetQuick(&net_address, com_argv[i + 1]);
2511 Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
2513 // COMMANDLINEOPTION: Server: -port <portnumber> sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine
2514 if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
2516 i = atoi(com_argv[i + 1]);
2517 if (i >= 0 && i < 65536)
2519 Con_Printf("-port option used, setting port cvar to %i\n", i);
2520 Cvar_SetValueQuick(&sv_netport, i);
2523 Con_Printf("-port option used, but %i is not a valid port number\n", i);
2527 net_message.data = net_message_buf;
2528 net_message.maxsize = sizeof(net_message_buf);
2529 net_message.cursize = 0;
2533 void NetConn_Shutdown(void)
2535 NetConn_CloseClientPorts();
2536 NetConn_CloseServerPorts();